7 Parametric Measurement Information

0 or

Vcc 1

VI

TXD

CANH

CANL

VO(CANL ) VO(CANH)

VOD

IO(CANH)

IO(CANL)

GND2

GND1

GND1

GND2

II

VOC

VO(CANH) + VO(CANL)

2

RL

Figure 7-1. Driver Voltage, Current and Test Definitions

» 2.

5 V

» 3.5 V

»

1.5 V

Recessive

Dominant

O (CANH)

V

O (CANL)

V

Figure 7-2. Bus Logic State Voltage Definitions

VI

(SEE NOTE A)

VO

TXD

CANL

CANH

C

Vcc /2

Vcc /2

Vcc

t

f

t

r

t

PLH

t

PHL

10%

90%

0.9V

0 V

VO(D)

VO(R)

0.5V

V

I

VO

R

L

L

A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 125 kHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO =

50 Ω.

Figure 7-3. Driver Test Circuit and Voltage Waveforms

RXD

CANH

CANL

GND2

GND1

VI(CANH)

VI(CANL)

IO

VIC

VI(CANH)

=

VI(CANL)

+

2

VID

VO

Figure 7-4. Receiver Voltage and Current Definitions

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ISO1044

SLLSFB0A – MARCH 2020 – REVISED JULY 2020

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